[BRLTTY] Using the Orbit Reader 20 with BRLTTY and Orca

[Nolan Darilek]

Hey, just picked up one of these recently and had a few questions. I've 
gotten it intermittently working with BRLTTY, but not at all with Orca. 
Was hoping someone could help me out.


1. The Orbit has two modes that seem relevant to BRLTTY use:: Serial and 
HID. I assume I want to use serial mode?


2. What is the process for using the Orbit with BRLTTY if I'll be 
plugging and unplugging it fairly regularly? Specifically:

a) I'm using BRLTTY with systemd. Can I leave the service running, 
connect/disconnect the unit, and expect to have that change noticed? Or 
will I need to restart the service whenever reconnecting?

b) Do I need to do something on the unit itself, other than 
connecting/starting the unit, to get output? I'm getting an alert about 
the screen not being in text mode, which makes sense since I'm in X. But 
I only get that message sometimes, and it doesn't always appear after 
I've plugged in the unit, enabled serial mode, and restarted the systemd 
service.

c) Can BRLTTY handle its configured device node appearing/disappearing?


3. My unit seems to use /dev/ttyACM0, not /dev/ttyUSB0. What does ACM 
mean in this context?


4. How do I use BRLTTY with Orca? I'm on Fedora 29. I've installed the 
brlapi package and added:


api-parameters Auth=group:brlapi        # Allow some local group


and my user is in the brlapi group. I've enabled Braille in Orca, and 
have restarted. Do I need to enable anything else?


5. I see lots of this in my logs. What does it mean?


Jun 05 18:06:00 desktop systemd[1]: Starting Braille display driver for 
Linux/Unix...
Jun 05 18:06:00 desktop brltty[18771]: BRLTTY 5.6 rev unknown 
[http://brltty.com/]
Jun 05 18:06:00 desktop brltty[18771]: BRLTTY 5.6 rev unknown 
[http://brltty.com/]
Jun 05 18:06:00 desktop systemd[1]: Started Braille display driver for 
Linux/Unix.
Jun 05 18:06:00 desktop brltty[18772]: NoSpeech Speech Driver:
Jun 05 18:06:04 desktop brltty[18772]: Ignored Byte: 1B
Jun 05 18:06:04 desktop brltty[18772]: Ignored Byte: 34
Jun 05 18:06:04 desktop brltty[18772]: Ignored Byte: 04
Jun 05 18:06:04 desktop brltty[18772]: Ignored Byte: 1B
Jun 05 18:06:04 desktop brltty[18772]: Ignored Byte: 34


Thanks.